tunnelling

例句：

1. 1. The tunnelling machine is capable of digging through rock with ease.
   这种隧道挖掘机可以轻松地在岩石中挖掘。
2. 2.The construction crew is working on the tunneling project in the mountainous area.
   施工队正在山区进行隧道挖掘项目。
3. 3.The tunneling process requires careful planning and execution to ensure safety.
   隧道挖掘过程需要仔细规划和执行，以确保安全。